RECON: TNO occultation with 01KO77

Event between 01KO77 and star UC4-372-099894 with event index number of 115885

Geocentric closest approach at 2018/05/11 15:59:46 UTC

J2000 position of star is 17:46:48.4 -15:45:43
Equinox of date position of star is 17:47:45.2 -15:46:02
Stellar brightness R=16.3
Star is 96 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=23.4

TNO is 37.5 AU from the Sun and 36.7 AU from the Earth.
The TNO is moving 19.1 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 319 seconds.
The 1-sigma cross-track error in the shadow position is 2866 km.

The TNO has an absolute magnitude Hv=7.6
Diameter=179.5 km assuming a 5% albedo -- 9.7 sec chord
Diameter=73.3 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 01KO77, (2018/05/11 16:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.2 -26:28:16  0.9 20.93 112
35Eta Oph      17:11:25.9 -15:44:47  2.6  8.76 104
PPM 233599     17:48:39.6 -14:43:52  5.9  1.05  95
PPM 233581     17:47:39.9 -16:00:34  8.4  0.25  95
PPM 233570     17:47:09.5 -15:47:25  9.1  0.17  96
01KO77         17:47:51.7 -15:46:04 16.3        95
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 01KO77, (2018/05/11 16:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 20.93 112
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.76 104
PPM 233599     17:47:36.8 -14:43:33  5.9  1.05  95
PPM 233581     17:46:36.4 -16:00:13  8.4  0.25  95
PPM 233570     17:46:06.1 -15:47:03  9.1  0.17  96
01KO77         17:46:48.4 -15:45:43 16.3        95
Positions are for J2000

Event circumstances last updated at 2016/06/15 20:05:16 UT

Marc W. Buie, Southwest Research Institute

RECON